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Finding the Fourth Proportional to 459,862,277.60, 689,793,416.40 and 426,605,880.80

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Solution

The fourth proportional to 459,862,277.60, 689,793,416.40 and 426,605,880.80 is: 639,908,821.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,862,277.60 : 689,793,416.40 = 426,605,880.80 : x
  2. Step 2: Convert to fraction form
    459,862,277.60/689,793,416.40 = 426,605,880.80/x
  3. Step 3: Cross multiply
    459,862,277.60x = 689,793,416.40 × 426,605,880.80
  4. Step 4: Simplify right side
    459,862,277.60x = 294,269,927,973,363,136
  5. Step 5: Solve for x
    x = 294,269,927,973,363,136/459,862,277.60
  6. Step 6: Final answer
    x = 639,908,821.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.